Pump and the like



Mar. 3; 1925.

F. MILLER PUMP AND THE LIKE Filed Aug. 4, 1924 INVENiOR.

Patented Mar. 3, 1925.

UNITED STATES FREDERICK MILLER, OF C OLLEGE CORNERS, INDIANA.

PUMP AND TI-IE LIKE.

Application fil ed August 4, 1924. Serial No. 729,909.

1 '0 all whom it may concern 7 Be it known that I, FREDERICK MILLER, a citizen of the United States, residing in College Corners, in the county of Union and State of Indiana, have invented certain new and useful Improvements in Pumps and the like, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in pumps, having particular reference to double acting pumps.

The object obtained in my invention consists in providing pump mechanism of simple, durable construction in which the How of liquid through the suction line and through the discharge line will be equal and uniform on both strokes ofthe reciprocal action of the pump.

A feature of the mechanism consists in improved valves and arrangement of the.

pump pistons relative to the suction line which are effective to maintain the pump mechanism primed and at the same time to provide drainage to prevent freezing in cold weather.

To this end means are provided for efiecting a balanced relation between the amount of. liquid. delivered on the respective strokes of the pump to maintain the discharge at the maximum point.

To this end also, the connection of the suction line to the pump cylinders is at an intermediate point between double-acting pistons so that the movement of the liquid through the suction line to the cylinders and through the discharge line will be of equal volume on each action of the pump.

A further improvement consists in the arrangement of the assembled parts, the general design being such as will afford convenient accessibility and easy removal and replacement of parts, the complete assembly as a unit being compact and comprising relative few parts.

The general principles of construction of the pump cylinders, pistons, valves, suction line connection, etc., are equally adaptable to vertical and horizontal pumps, only minor modifications of detail parts as illus trated in the accompanying drawings being necessary to adapt the improved construction to pumps of both types. 7

:In the drawings:

Fig. 1 is a vertical sectional view ofthe pump cylinder and pistons showing the-relation of the pistons one to the other and to the suction line, and details of the valves;

Fig. 2 is a longitudinal sectional view of the pump in horizontal arrangement;

Fig. 3 is a longitudinal sectional view of a modified construction of the pump casing 0r cylinders;

Figs. 4 and 5 are detail views of valves.

As shown in Fig. 1 the pump cylinder mechanism comprises an upper cylinder 1 of relative small diameter and a lower cylinder 2 of larger diameter, the cylinders being joined one'to the other by an intermediate housing 3 to which the suction line 4 is connected.

The lower cylinder is closed at its lower end by a threaded cap 5 which has the effect of forming a closed chamber or well in which the lower piston 6 operates. The upper piston '7 operates incylinder 1 and is connected to cylinder 6 by a tube 8 and an intermediate valve housing 9, the upper end of the cylinder being provided with an end cap connection .10 to the discharge line 11.

The details of the upper piston comprise a bail 12 which is threaded on tube 8 and to which the piston rod 13 is connected. Also threaded on tube 8 and coacting with the lower end of p-art 12 is a lock ring'l i, the two parts actingto hold the cup-shaped suction member 15 firmly therebetween.

The lower piston may be considered to include the intermediate valve housing, and the more direct parts of the piston consisting of an apertured valve-seat member 17 which serves also as the connection to housing 9. An inverted cup-shaped suction member 18 serves also as the coacting valve member to the apertured valve seatmember 17 part 18 being held in assembled relation with part 17 by means of a sleeve 19, an annular retaining disc 20, and depending screws 21 which are extended through disc 20 and threaded into part 17 and act to secure parts 18, 19, and 20 firmly to part 17, the inner portion of the suction member 18 extending over the series of circumferentially arranged apertures 22 in part 17 and functioning therewith in a valve action in the operation of the pump. An annular disc 23 pressed upwardly by compression spring 24; supported on disc 20 acts under the spring pressure to insure dependable action of the valve.

A detail of the valve parts 17 and18 is shown in Figs. 3 and 4, part 18 being provided as here shown with a series of radial slots 25, extended outwardly from the central aperture of the part, which serve to render the several portions 26 more flexible and therefore more effective in their functional relation to the valve parts 22.

The valve 16 may be of any suitable construction. As here shown the valve housing 9 is provided with a valve seat 2? arranged at an angle of approximately 15 degrees to provide for easy action of the valve closing member 16 which, as here shown, is connected pivotally to housing 9 by means of a link 28. A small vent 29 is provided in part 16 to provide for draina e to prevent freezing of the liquid in tube 8 in cold weather. A vent 30 is also provided in the valve housing 9 to provide for drainage and also to admit air to the space outside the housing,thus to break the vacuum and prevent the syphoning action in the suction line which would otherwise result upon the water level falling below the level of the suction intake.

The action of the pump, as best illustrated in Fig. 1, is as follows:

The mechanism as shown illustrates the parts in their respective relations one to another near the completion of the up stroke of the pistons. On this action a quantity of liquid above valve 16 and the upper piston, equal to the displacement of the piston, is discharged from the pump. During this action the movement of liquid from the suction line will be through valve l8-22 into cylinder 2. On the down stroke of the pistons valve 18-22 will be closed, valve 16 under the upward pressure of the liquid will open and a portion of the liquid displaced in cylinder 1 will be delivered. upward through the tube 8 and discharged, the remaining portion filling cylinder 1 for the succeeding up stroke.

The relative capacities of cylinders 1 and 2 is such that the displacement of liquid in cylinder 1 on the up stroke of the pistons is substantially one-half the displacement in the lower cylinder on the down stroke,thus on the down stroke half the liquid displaced in cylinder 2 is discharged from the pump, the upper cylinder being charged with the remaining half.

The lower cylinder being in the form of a closed well, it will be observed that the displacement of liquid on each action of the pump will be positive and, therefore that uniformity of discharge of liquid will result.

Also as a result of the closed cylinder fea ture, the pump will remain full-primed under all conditions, as there can be no leakage that would make priming necessary.-

In the horizontal arrangement of the pump as shown in Fig. 2, the suction line connection 31 is at the under side and the connection 32 to the discharge line at the upper side of the pump,the construction and operation of the pump otherwise being sub stantially the same as that shown in Fig. 1. The horizontal type of pump is adapted primarily for automatic water systems for residences.

The modified construction of the pump cylinders shown in Fig. 3 is a suitable form for adapting the improved construction to tubular or eased wells,-the construction and operation of the pump otherwise being substantially the same as that illustrated and described in c .nnection with Figs. 1 and 2. As here shown the modified construction comprises a suction line connection 33, lower cylinder housing 34, lower cylinder 35, upper cylinder 36, and a coupling 37 between the cylinders and the cylinder housing 34, the coupling being provided with a flange 38 extended inwardly of the housing to con nect with the lower cylinder, the flange being provided with a series of circumferentially arranged inlet apertures or ports 39 to admit the water from the suction line to the lower cylinder,the latter being closed at its lower end by a plug or end cap 10 in a manner similar to and for the same purpose as that shown in Figs. 1 ant Having described my invention, 1 claim:

1. A pump comprising a plurality of cylinders joined one to the other and open one to another axially, a piston operable in each cylinder, a tubular member connecting the piston of one cylinder with the piston of another cylinder, a suction line common to said cylinders and valves responsive to the action of said pistons whereby liquid in said cylinders ahead of the pistons will be discharged on one stroke of the pump and the liquid back of the pistons will be discharged through said tubular member on the opposite stroke of the pump.

2. A pump comprising a plurality of cylinders of unequal piston displacement, and open one to another axially, a piston operable in each cylinder and coacting one with the other, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby liquid in said cylinders ahead of the pistons will be discharged on one stroke of the pump, and a like amount of liquid back of the pistons will be discharged and a further like amount of liquid willbe delivered from one cylinder to the other on the opposite stroke of the pump.

3. A pump comprising a plurality of cyl inders of un qual piston displacement, and open one to another axially, a piston operable in each cylinder, one piston being joined to the other and having a passage for liquid therebetwcen, a suction line connected to said cyl nders mtermediate said pistons,

and valves responsive to the action of said pistons whereby liquid in said cylinders ahead of the pistons will be discharged on one stroke of the pump and a like amount of liquid back of the pistons will be discharged from'the pump and a further like amount will be delivered from one cylinder to the other through said passage between the pistons on the opposite stroke of the pump.

4. A pump comprising longitudinally opposite cylinders joined and open one to the other, one of the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder and coacting one with the other, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby liquid ahead of the piston in one cylinder will be discharged, andliquid from the suction line will be delivered into the closed end of the other cylinder on one stroke of the pump, and liquid back of the piston in said closed end of the cylinder will be discharged on the opposite stroke of the pump 5. A pump comprising longitudinally opposite cylinders of unequal piston displace" ment, joined one to the other and open one to the other axially, one of the cylinders having a closed end, a piston operable in each cylinder and coacting one with the other, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby on one stroke of the pump liquid ahead of the piston in one cylinder will be discharged and a greater amount of liquid than that discharged will be delivered from the suction line to the closed end of the other cylinder, and on the opposite stroke of the pump a like amount of liquid will be discharged and a further like amount will be delivered from said closed cylinder to the adjacent cylinder.

6. A pump comprising longitudinally opposite cylinders of unequal piston displace ment, joined one to the other and open one to the other axially, one of the cylinders having a closed end, a piston operable in each cylinder and coacting one with the other and having alternate work strokes, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby upon operation of the pump liquid ahead of the piston on the work stroke will be discharged and a greater amount of liquid than that discharged will be delivered from the suction line through the piston on the idle stroke into the closed end of the other cylin der, and on the work stroke of the opposite piston a like amount of liquid will be discharged and a further like amount will be delivered from one cylinder to the other.

T. A pump comprising longitudinally opposite cylinders of unequal piston displacement, joined one to the other and open one to the other axially, one of the cylinders having a closed end, a piston operable in each cylinder, a passage for liquid from one cylinder to the other, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby upon operation of the pump liquid ahead of the piston on the work stroke will be discharged and a greater amount of liquid than that discharged will be delivered from the suction line into the closed end of the other cylinder, and on the work stroke of the opposite piston the liquid in said closed end will be under pressure of the said working piston and a like amount of liquid will be discharged and a further like amount delivered from one cylinder to the other through said passage.

8. A pump comprising longitudinally opposite cylinders of unequal piston displacement, joined one to the other and open one to the other axially, one of the cylinders having a closed end, a piston operable in each cylinder, a tubular member connecting one piston to the other and serving as a passage for, liquid -from one cylinder to the other, a suction line common to said cylinders, and valves responsive to the action of said pistons whereby upon operation of the pump liquid ahead of the piston on the work stroke will be discharged and a greater amount of liquid than that discharged will be delivered from the suction line into the closed end of the other cylinder, and on the work stroke of the opposite piston the llquid 1 in said closed end will be under pressure of the said working piston and a like amount of liquid will be discharged and a further like amount delivered from one cylinder to the other through said passage.

9. A double-acting pump comprising adjacent cylinders joined together and open one to the other longitudinally, one of the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder, one piston being joined to the other by a tube, and having alternate work strokes one with the other, a valve in said tube intermediate the pistons, a suction line common to the cylinders and connected thereto intermediate the pistons, and a valve in the piston operable in the cylinder having the closed end coacting between the suction line and said receptacle.

10. A double-acting pump comprising adjacent cylinders joined together and open one to the other longitudinally, one of the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder, one piston being joined to the other by a tube, and having alternate work strokes one with the other, a valve in said tube intermediate the pistons, a suction line common to the cylinders and connected thereto intermediate'the pistons, and a valve in the piston operable in the cylinder having the closed end operable alternately With said first named valve and eoacting between the suction line and said receptacle.

11. A double-acting pump comprising adjaeent cylinders joined together and open one to the other longitudinally, one or the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder, one piston. being joined to the other by a tube, and having alternate \vorl: strokes one with the other, a valve in said tube intermediate the pistons, a suction line common to the cylineers and connected thereto intermediate the pistons, and a valve in the piston operable in the cylinder having the closed end operable alternately With said first named valve and comprising a series of apertures arranged circumferenlially in the piston and an annular valve controlling member common to all or said aperlures.

l2. A- double-acting pump comprising adjacent cylinders joined together and open one to the other longitudinal y, one of the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder, one piston being joined to the other by a tube, and having alternate \vo strokes one with the other, a valve in said tube intermediate the pistons, a suction line common to the cylinders and connected thereto intermediate the pistons, and a valve in the piston operable in the cylinder having the closed end operable alternately with said first named valve and comprising a series of apertures arranged ciroum'ferentially in the p' -on and an annular membe" arranged to act as the suction element 0.1 the piston and as a valve controlling member common to i all of said apertures.

18. A double-acting pump comprising adjacentcylinders joined together and open one to the other longitudinally, one of the cylinders being closed at one end to form a receptacle for liquid, a piston operable in each cylinder, one piston being joined to the other by a tube, and having alternate work strokes one with the other, a valve in said tube intermediate the pistons, a suction line common to the cylinders and connected thereto intermediate the pistons, and a valve in the piston operable in the cylinder having the closed end operable alternately with said first named valve and comprising a series of apertures arranged circuu'iferentially in the pistons, an annular member acting as the suction element or the piston and as the valve controlling member for all of said apertures, and a spring element arranged to exert pressure on said annular member.

In testimony whereof, I atlix my signature.

FREDERICK MILLER. 

